An interesting case of complete anuria of eight days' duration occurred in a young man of previous good health with the exception of occasional polyuria at varying intervals.

Anuria may develop in four ways: (1) following intense congestion in acute nephritis; (2) in renal stone when calculi block both ureters; (3) when the suppression is perirenal, resulting from (a) fever and inflammatory processes, (b) acute poisoning by phosphorus, turpentine or lead, (c) collapse after operations or injuries and in the collapse stage of cholera and yellow fever; (4) hysteric anuria.

The case which I propose to report does not come under any of these headings with the possible exception of the fourth. But the correctness of classifying this case under hysteric anuria I think is doubtful. The patient had at no time previously shown any hysteric tendencies; his family history on this score was entirely negative.